3-tier shelving unit



FIG. 1 is a top perspective view of a 3-tier shelving unit showing the new design;

FIG. 2 is a top plan view of the 3-tier shelving unit shown in FIG. 1;

FIG. 3 is a bottom plan view of the 3-tier shelving unit shown in FIG. 1;

FIG. 4 is a right side elevation view of the 3-tier shelving unit shown in FIG. 1 (the left side elevation view of the 3-tier shelving unit is a mirror image of the view shown in FIG. 4); and,

FIG. 5 is a front elevation view of the 3-tier shelving unit shown in FIG. 1 (the rear elevation view of the 3-tier shelving unit is a mirror image of the view showing in FIG. 5).

The broken lines shown in the drawing views are included for the purpose of showing environmental structure that forms no part of the claimed design. 

CLAIM The ornamental design for a 3-tier shelving unit, as shown and described. 